diff options
Diffstat (limited to 'source/blender/editors/interface/tree_view.cc')
| -rw-r--r-- | source/blender/editors/interface/tree_view.cc | 31 |
1 files changed, 31 insertions, 0 deletions
diff --git a/source/blender/editors/interface/tree_view.cc b/source/blender/editors/interface/tree_view.cc index 04d7a066b36..c08fa51d5a5 100644 --- a/source/blender/editors/interface/tree_view.cc +++ b/source/blender/editors/interface/tree_view.cc @@ -29,6 +29,7 @@ #include "UI_interface.h" +#include "WM_api.h" #include "WM_types.h" #include "UI_tree_view.hh" @@ -354,6 +355,13 @@ void AbstractTreeViewItem::is_active(IsActiveFn is_active_fn) is_active_fn_ = is_active_fn; } +std::unique_ptr<AbstractTreeViewItemDragController> AbstractTreeViewItem::create_drag_controller() + const +{ + /* There's no drag controller (and hence no drag support) by default. */ + return nullptr; +} + std::unique_ptr<AbstractTreeViewItemDropController> AbstractTreeViewItem::create_drop_controller() const { @@ -686,6 +694,29 @@ bool UI_tree_view_item_matches(const uiTreeViewItemHandle *a_handle, return a.matches_including_parents(b); } +/** + * Attempt to start dragging the tree-item \a item_. This will not work if the tree item doesn't + * support dragging, i.e. it won't create a drag-controller upon request. + * \return True if dragging started successfully, otherwise false. + */ +bool UI_tree_view_item_drag_start(bContext *C, uiTreeViewItemHandle *item_) +{ + const AbstractTreeViewItem &item = reinterpret_cast<const AbstractTreeViewItem &>(*item_); + const std::unique_ptr<AbstractTreeViewItemDragController> drag_controller = + item.create_drag_controller(); + if (!drag_controller) { + return false; + } + + WM_event_start_drag(C, + ICON_NONE, + drag_controller->get_drag_type(), + drag_controller->create_drag_data(), + 0, + WM_DRAG_FREE_DATA); + return true; +} + bool UI_tree_view_item_can_drop(const uiTreeViewItemHandle *item_, const wmDrag *drag, const char **r_disabled_hint) |